Description Vance & Hines Blackbird 450 Slip-On Mufflers for 2017-Newer Touring: Featuring Vance & Hine’s most aggressive baffle core to date, specially designed for Milwaukee-Eight engines Massive 4.5″ muffler bodies Ceramic matte black or chrome muffler housings Mounting hardware and instructions included Sold in pairs Made in the U.S.A.